body{
	background: url(../img/liuyan.jpg);
	background-size: 100% 100%;
	background-position: 0 -300px;
	}
.jieshao{
	height: 100px;
}
h3{font-family: "微软雅黑";text-align: center;}
.fabu{
	background-color: rgba(75, 81, 95, 0.3);
}
